Cities can play a pivotal role in accelerating climate action (i.e., climate mitigation and adaption). Yet, the success of cities’ climate strategies strongly depends on the cities’ residents, as city residents often have to accept, adopt, undertake and participate in climate actions. In the current paper, we discuss how better understanding city residents’ motives – and particularly the personal and group values that underlie city residents’ climate actions – could foster climate action in cities. Importantly, we discuss the rich literature in social sciences on personal values, which – though typically overlooked by policy makers – highlights the relevance of focusing on personal biospheric values (i.e., caring about nature and environmen...